78444674 has 32 divisors (see below), whose sum is σ = 153086976. Its totient is φ = 29232720.

The previous prime is 78444671. The next prime is 78444677. The reversal of 78444674 is 47644487.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (78444671) and next prime (78444677).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (78444671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7532 + ... + 14615.

It is an arithmetic number, because the mean of its divisors is an integer number (4783968).

Almost surely, 2^78444674 is an apocalyptic number.

78444674 is a deficient number, since it is larger than the sum of its proper divisors (74642302).

78444674 is a wasteful number, since it uses less digits than its factorization.

78444674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22190.

The product of its digits is 602112, while the sum is 44.

The square root of 78444674 is about 8856.8997962041. The cubic root of 78444674 is about 428.0762703626.

The spelling of 78444674 in words is "seventy-eight million, four hundred forty-four thousand, six hundred seventy-four".